George crompton



GEORGE C RO MPT() N, 0 F t WORGESTE R, MASSACHUSETTS.'

Letters Patent No. 75,530, and March 1t, 1868.

1 IMPROVEMENT IN LOOMS.

@tigt Stlptult meint tu'r these tettets- 'i'tmt'imt hitting mrt nttlptmn.

V V'lO ALL WHOM ITMAY CONCERN:

Be it known that LGEORGE CRoMPTONfoF Worcester, in the county ot'Worcester, anll State of Massachusctts, have invented certain new anduseful Improvements in Looms; and I do hereby declare that thefollowing, taken in connection with the drawings which accompany andform part-ot' this specification, is a description of myv inventionsutlicient to enable those skilled in the vart to practise it.

'lhe invention relates partly to the harness-mechanism and partly to themovable shutter-box mechanism of fancy hoons.y A 'l 4 The invention'consists `prinfxrarily in combining withaiifter and a dcpresser workingas levers from fulcra in' the vertical lplane ofthe cloth-making line,and with jacks having slots in which the lifter and depresserlevers workto' insure the proper rise and'fall of the jacks, two horizontalcvener-arms between which the heddlelevers extend, the even'ers actingas clamping-jaws, to not only even the jacks after each change producedby4 the -pattern-cylinder, but by clamping them together, :to removethem with certainty from all strain ofthe lifter and depresser-levers,so. that as the slots come into line, the tension upon thejacks shallfree them frolthe lifter and de'presser, and ,straighten them in'toline, ready for the next change to be produced by the patterncylinder.if

The invention further consists'in the arrangement or construction of themechanism connecting the tappetlever, which works the shuttle-boxes,with thc rod upon which cach set of boxes is supported.

The drawings representa loom-frame with my improvementsembodedthereupon, showing an end view,

B a front elevation. C is a view of the rear side of thetstirrup whichsupports the shuttle-box rod. a' denotes the frame, b the lathe, cctheharness-leaves or frames, each suspended betweenan upper Aand a lowerheddlelever, d, the series of levers being supported on shafts e, andbeing connected' at their front ends by upright 1 jacks or hooks,f, and`straining-wires,g. Each jackf has a slot, g', cut into each of itsopposite edges, said slot being made wideA enough to allow it to slipfreely into and out of connection with either the lifter-bar or lever h,or the depresser-bar or lover z'. Y Th'lifter and depresser-leversarevfulerumed at k and Z, in or about in the plane of the cloth-making line,and they are actuated by slide-rods 7c', (to which they are adjustablyconnected,) these rods being raised and lowered by cranksrZZ-on themain'shaftv m. v

Each jack is carried into connection with either the lifter or depresserat or about the time the shed isclosed, by the action upon it ofthepatternfeylinder n, the particular leaf with which each pair ofheddle-levers is connected being raised or` lowered to form with theother leaves the desired shed, accordingly as its jack may be thrownintoconnection with either the lifter er clepresser.

At the upper end of each slide-rod cY is a horizontal evencr-bar, a, theone upon the rod which carries thev lifter-lever extending over theheddleilevcrs, and the one on the rod which carries the depresser-lever4extending under the heddle-levers, as shown at B.

When the lifter and depresser work slots in the jacks, and are arrangedto operate from fulcra, and are actuated by the slide-rods, as shown, itsometimes happens that some particular jack clings on to the lifter or`depresser-lever too long,'or is not freed therefrom by the tension oi'the 'wire quickly enough to be actuated by the studs or teeth on thepattern-cylinder or chainfor the next-shed. 'lo obviate this, or toinsure the loosening of the jack-notches from thclifter andclepresser-levers, I apply the horizontal eveners to the slide-rods c,as shown, or in such manner'thatjust before the cylinder is to producethe change, the upper heddle-levers are clamped betveen thecveners-bars, which are so positioned upon the slide-rods, that whenthey close upon the levers the respective slots arenot .only broughtintov line, but with such relation to the elevator or depresser-` lever,that their `upper and lower surfaces are carried out of yline with theadjacent edges of the elevator or deprcsscr-levers, so that the tensionon the jacks cannot fail to bring the jacks into line for the nextchange to be produced by the pattern-cylinder.

'.lhe li'ulera't'lof the lifter and depresser-levers are stationary, andthe vibrating ends ot' the levers are slotted, as seen att-a2, thelevers being connected to the slide-rods by pins bz'extending throughthe slots, the

i levers slipping'or playing upon these pins, as they vibrate, thisconstruction being in contradistinction to connecting the levers to theslide-rodsfunyieldingly, (endwise,) and allowingthe fulcra toj'play intheir slots. In

connection with giving this capability of play to the levers, by thoslotsf at the pins b2, by which 'they are connected to the rods 7c', thestationary fulcra are made adjustable by means of the slots o2 in theplate to which the levers are fulerumed. I

The movable shuttle-boxes are shown atpp, they being of' that class inwhich the change is made from piel; to pick by vertical movement of theboxes.

Each set of boxes is mounted on a vertical rod, q, supported upon' aspring, 1', which spring rests upon the top of a strrup,s, the rodpassing through the stirrup, and it and the boxes being held normally inposition relatively thereto by the stress of the spring 1', while suchspring allows the strirrup to work 'up against the spring and towardsthe boxes, whenever' the free upward movement of the boxes may beobstructed, a collar or stop, t, determining the downward movement ofthe stirrnp upon the rod. Each rod slides freely through an arm, et,projecting from the frame a, the bearing v extending in between thc sidemills of thel stirrnp, as shown at D, which represents a cross-sectionthrough the stirrup. The employment of the stirrup to receive andcai-'ry the rod, and as a means of' connection between the tappct-leverand the rod, makes a much stronger and more reliable provision forsupporting the rod and insuring the proper movements ot' the boxes, thancan bc made `with a direct connection between the lever and rod, as iuthe ordinary construction. Each stirruprod, with the boxes, is actuatedfrom tappets w, on the tappet-shaft c,` through a lever, 7 hung on afulcrum, s, and connected at its front end to the stirtup, thc weight ofthe boxes and their connections, holding the piu al against the l'ncc ofthe tappets, while the movementof any tappet brings anyparticular boxinto line in the usual manner.

Instead of making a direct connection of the tappeti-lever to the rod orthc stirrup, I make such connection" through a link, bl, and Ijoint thislink to the stirrup in or nearly in line with the journals o" on whichthe lathe vibrates By this arrangement, the rod is entirely freed fromall lateral strain, (tending or which might tend to cause the boxes tobind in their gudes,) both from the motions of the tappetdever and thevibrations of thc lathe, and no vertical movement of the boxesy can takeplace except at the proper time, such vertical movement or play beingirremediable during the vibrations of the lathe under the differentpositions of the boxes for thc various picks, when theconncction is madewithoutthe linlc. The link is connected to the stirrup by anadjustingscrew and nut, working through a slot in the stirrup, thisallowing the movement of the boxes 'to be adjusted so as to bring themor insure their being brought more perfectly into line with theshuttle-racc.

. I claixmrin combination with angular lifter and dcpresser-levers,working upon fulcra iu the plane of the cloth-making line, horizontalrigid evener-bars fixed to the slide-rods and operating to even thejacks, substantially as described. 'I Y,

I also claim, in combination, horizontal rigid eveners, secured toslide-rods, angular lifter and depresserlevers, and the slotted jacks,substantially as described.

I also claim the slotted angular lifter andvdepresser-levers, working onstationary fulcro, combined substan tially as described with theslide-rods.

I also claim angular lifter and deprcsser-lcvers, vibrating onstationarybut adjustable fulcro, and fixed by sliding or yielding connections tothe actuating-rods,substantially as described.

Also, in combination with the movable shuttle-boxes and mechanism forsupporting and fOrhanging them, the stirrup s, arranged to operatesubstantially as described.

Also, in combination with the tappct-levcr and st-irrup, constructed asdescribedthe link b, connecting the iever and stirrup, and arrangedrelatively thereto, substantially as described.

GEO. CROMPTON.

Witnesses:

Hormon WYMAN, J. A. Wenn.

